Attachment for veneer-cutting machines.



A. E. BAXTBR. ATTACHMENT FOR VENEER CUTTING MACHINES; APPLIUATION FILED APB.24, 1911.

1,004,345. Patented Sept. 26, 1911, 2 SHEETS-SHEET 1.

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A. B. BAXTER.

ATTACHMENT FOR VENEER CUTTING MACHINES. APPLICATION rum) 12.24, 1911.

1,004,345. Patented ep 26, 11111.

2 SHEETS-SHEET 2.

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WITNESSES UNITED STATES PATENT OFFICE.

ARTHUR E. BAXTER, F STOCKHOLM, MAINE, ASSIGNOR OF ONE-HALF TO THE STANDARD VENEER COMPANY, OF I-IOULTON, MAINE, A CORPORATION OF MAINE.

ATTACHMENT FOR VENEER-CUTTING MACHINES.

Specification of Letters Patent.

Application filed April 24, 1911.

To all whom it may concern:

Be it known that I, ARTHUR E. BAXTER, a subject of the King of Great Britain, and resident of Stockholm, in the county of Aroostook and State of Maine, have invented certain new and useful Improvements in Attachments for Veneer-Cutting Machines, of which the following is a specification.

This invention relates to wood working machinery and particularly to a veneer cutting machine, the invention relating more particularly to an attachment for veneer cutting machines designed for slitting the veneer during the operation of cutting the veneer from the log.

An object of this invention is to provide novel means for regulating the position of the knives in order that the location of the knives with relation to one another may be regulated so that veneer may be cut in dif-.

ferent widths by the same machine and the adjustment for the cutting of the different widths may be accomplished expeditiously and conveniently.

A still further object of this invention is to provide veneer cutting knives, preferably arranged in pairs and having means for reciprocating the said knives in opposite directions so that one or the other of said knives may be projected into operative position, means being also provided for maintaining the parts in said operative position until properly manipulated.

A still further object of this invention is to provide means for adjusting the knives with relation to the knife-holders so that they can be projected to a greater or less extent beyond the knife rests or supports, and a further object of the invention is to provide a retaining plate in conjunction with the knife support, whereby the retaining plate serves to prevent dislodgment of the said knives with relation to the plate.

With the foregoing and other objects in view, the invention consists in the details of construction and in the arrangement and combination of parts to be hereinafter more fully setforth and claimed.

In describing the invention in detail, reference will be had to the accompanying drawings forming part of this specification wherein like characters denote corresponding parts in the several views, and in Which-- Figure 1 illustrates a View in elevation of a veneer cutting machine of ordinary type with the invention applied thereto; Fig. 2 illustrates an enlarged detail view in elevation showing the sliding knives and the manner of mounting the same; Fig.3 illustrates an end elevation of the slitting attachment to be applied to a veneer cutting machine; Fig. 4 illustrates a sectional view on the line 4 4: of Fig. 2; and Fig. -5 illustrates a detail view of the guide plate and the knives associated therewith.

In these drawings 10 denotes the base or guide plate which is adapted to be attached to the ordinary knife supporting plate of a veneer cutting machine, the said guide plate having vertically disposed slots 11 which form ways for the reception of the knives 12 which slide therein and project from the lower corner of the guide plate. The guide plate is retained on the frame of a veneer cutting machine by the screws 14 or other appropriate fastenings and the knives 12 are therefore confined within the slots and cannot be displaced therefrom except by movement longitudinally of the knife.

The machine has the brackets 15 secured thereon, the said brackets having journal bearings for the shafts 16 and 17 which are designed to rock in the bearings under the influence of the arms 18 and 19 respectively. The shaft 16 is provided with apertured disks 20 which have studs 21. and 22 on opposite sides of the shaft, the said disks being secured to the shaft by means of the set screw 23. The stud 21 has a pitman 24: connected to it and the stud 22 is likewise provided with a pitman 25, the said pitmen at their ends remote from the disks being pivotally connected to the tool clamps 26 and 27 respectively through the medium of the wrist pins 28 and 29 respectively. The tool clamps have slidably mounted therein the knives 12 which are held at different positions of adjustment by the set screws 30.

The arm 18 has a bolt 31 therein slidable transversely thereof and said bolt is held normally inwardly with the head 32 of the bolt in contact with the arm by means of the spring 33 which has one end anchored to the arm and has its opposite end provided with an aperture to receive the bolt, which bolt has a shoulder 34 thereon to be engaged by the spring. A curved gage bar 35 is secured on one of the brackets, the said gage bar being provided with apertures 86 to re ceive the bolt so thatthe arm 18 may be held at different positions of adjustment.

From an inspection of the drawing, it will be observed that the parts just de scribed are in such relation to one another that the two knives 12 are out of operative relation to the veneer cutting machine when the arm 18 is stationed at a point intermediate the length of the gage bar for in such position both of the cutting edges of the knives are within the guideways formed by the slots in the guide plate. Movement of the arm, however, toward either end of the gage plate will result in projecting one or the other of the knives beyond the lower edge of the guide plate and project it into operative position to slit veneer which has been produced by the veneer cutting machine. It is the purpose of the inventor to have a plurality of disks on the shaft 16 to duplicate the knives and the parts associated therewith for operating the knives, hence it will be possible by the operation of the arm 18 to project a series of knives into operative position beyond the guide plate and as the knives are spaced apart a predetermined distance a veneer of predetermined width may be cut.

Between each pair of knives operated by a disk on the shaft 16 is another pair of knives which is operated from the shaft 17 and to the end that the knives controlled by the shaft 17 may be projected into operative position, the shaft 17 is provided with a series of disks 37. Pitmen 38 and 39 are connected thereto on opposite sides of the shaft 17, the disk in turn being connected to the shaft 17 by the set screw 40. The pitmen 38 and 89 are connected to work clamps 41 and 42 respectively and the work clamps have secured in them knives 43 and 44 respectively which are slidable in the slots of the guide plate.

The shaft 17 is oscillated under the influence of the arm 19 which has pivoted in its outer end a detent or dog 45 controlled by a spring 46 seated in a,slot 47 in the said arm. The dog has a nose 48 which is effective to enter apertures 49 in the gage plate 50 which gage plate is secured to the guide plate by means of the screws 51. Upon oscillation of the arm 19 from a neutral or central position, in which position the knives are bot-h well within the slots back of the retaining plate, one or the other of the said knives is projected into operative relation in a manner similar to that de-- Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

scribed in connection with the knives that are controlled by the operation of the shaft 16. The apparatus is, therefore, efiective to project difierent sets of knives into operative position so that the distance between the several knives may be determined by the operator who wishes to cut the veneer into strips of different widths. It is the purpose of the inventor to have the series of knives on the shaft 16 alternate with the knives on the shaft 17 as before mentioned and thereby he is enabled to readily change the machine to cut the veneer in clifferent widths.

The guide plate is adjustable on the frame of the veneer machine through the medium of the slots and the fastenings secured through the guide plate and the frame of the veneer machine and said adjustment further afiords means for changing the action of the knives for slitting the veneer.

I claim 1. In a veneer cutting machine, a frame, a guide plate secured to the frame, brackets, shafts journaled in the brackets, disks on the shafts, pit-men connected to the disks on opposite sides of the shafts, tool clamps to which the pitmen are pivotally connected, knives held by the tool clamps, and means for partially rotating each shaft.

2. In a veneer cutting machine, a slitting attachment comprising a guide plate having slots therein, knives slidable in the slots, tool clamps to which the knives are connected, pitmen on which the tool clamps are mounted, disks to which the pitmen are pivotally connected, shafts on which the disks are mounted, means for partially rotating the shaft, and means for holding the shaft rotating means in diiferent positions of adjustment.

3. In a veneer cutting machine, a slitting attachment therefor comprising a guide plate, knives movable with relation to the guide plate, tool clamps to which the knives are connected, brackets, shafts journaled in the brackets, spaced disks on one shaft, disks on the other shaft intermediate the disks on the first mentioned shaft, pitmen connected to the disks of both shafts, the said pitmen being in pairs and each pair being connected to a disk to be moved in opposite direct-ions thereby, means on each shaft for partially rotating the same, and means for holding the shaft rotating means in dif ferent positions of adjustment.

In testimony whereof, I affix my signature in the presence of two witnesses.

ARTHUR E. BAXTER. Witnesses:

Lor'rm E. BARKLEY, A. E. KEssLER.

Washington, D. G. 

